Persulfate
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A persulfate (sometimes known as peroxysulfate or peroxodisulfate) is a compound containing the
anion An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by conven ...
s or . The anion contains one
peroxide In chemistry, peroxides are a group of Chemical compound, compounds with the structure , where the R's represent a radical (a portion of a complete molecule; not necessarily a free radical) and O's are single oxygen atoms. Oxygen atoms are joined ...
group per sulfur center, whereas in , the peroxide group bridges the sulfur atoms. In both cases, sulfur adopts the normal tetrahedral geometry typical for the S(VI) oxidation state. These salts are strong oxidizers.


Ions

* Peroxomonosulfate ion, * Peroxydisulfate


Acids

* Peroxymonosulfuric acid (Caro's acid), H2SO5 * Peroxydisulfuric acid, H2S2O8


Example salts

* Sodium peroxomonosulfate, Na2SO5 *
Potassium peroxymonosulfate Potassium peroxymonosulfate is widely used as an oxidizing agent, for example, in pools and spas (usually referred to as monopersulfate or "MPS"). It is the potassium salt (chemistry), salt of peroxymonosulfuric acid. Potassium peroxymonosulfate ...
, KHSO5 * Sodium persulfate (sodium peroxydisulfate), Na2S2O8 * Ammonium persulfate (ammonium peroxydisulfate), (NH4)2S2O8 * Potassium persulfate (potassium peroxydisulfate), K2S2O8


References

Sulfur oxyanions Preservatives {{Inorganic-compound-stub